Performance Pack Oil Pressure PSI?

[CB]

We're joking. Just go with it.

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[AmericanLegend]

That's perfectly logical reasoning.

Hell, I thought something was wrong with my car.

More Data...More Problems.....haha

I actually had the same concern....but my "concern" was when the engine is at normal operating temp and at idle. I'm normally ~20-25psi in those conditions. That seemed a bit low to me. But I have no real basis for reference. So I trust the Ford engineers designed an oil pump that provides sufficient oil pressure at idle.

I'm curious as to what the minimum pressure at idle should be. I'm thinking ~ 20 psi?

Watched TV show where the guys brand new race motor's oil pressure wouldn't get above 35psi.. He ended up destroying his bearings.

So that thought is going though my head as I see my gauge sitting at 20-25psi. I realize that 20 psi at idle is very different then the TV show guy not seeing a pressure over 35psi...at high rpms.

 

[crs2879]

In most cars, Mustang included, the oil pressure is generated via some form of pump powered by engine rotation (crankshaft, camshaft, etc). The faster a pump rotates, the more fluid/air it flows and creates higher pressure (assuming the outflow pipe diameter is fixed). As long as the gage movement is linear with engine speed, you should be good. A co-worker asked me yesterday about his truck OP gage going down while going up a hills.....I told him either your pump is going bad, pick-up screen is clogged or seriously low oil level......turned-out it was seriously low oil level in his case.

 

[offroadkarter]

Gotta like that Inhgs gauge......whatever it's measuring.

Its called a vacuum gauge, its measuring engine vacuum. InHg = Inches of Mercury whereas "Hg" is the symbol for the periodic element of "Mercury".



Not sure if you're aware of this, but our engines actually convert gasoline to mercury, which is why its measuring how many inches of mercury we're pulling. Pretty trick shit Ford is doing with these new flex fuel engines.

Yep, high PSI on cold start appears normal. I recall when I bought a '01 Bullitt GT, it had an analog OP gage but was really just a glorified warning light as the needle never moved once acceptable OP was reached. I actually contacted Ford and was told that having an actual OP gage caused too many warranty claims due to owners insisting their was something wrong with their car because the OP fluctuated.......I find that hard to believe but it has stuck with me because a Ford employee stated that was the reason.

This has been true for a very long time, I'm surprised the PP cars even have a real oil pressure gauge. The 03-04 Marauders have fake autometer oil pressure gauges because of...

Hell, I thought something was wrong with my car.

^ People back in the 80's who used to take cars into the dealer saying "my car is broken".


I think the factory gauge is pretty heavily dampened though, the real oil pressure gauge I have in my 04 Marauder swings fast. Not sure if I could fix that in the Mustang but eh, whats the point.

 

[CB]

Converting gasoline to mercury? Would that be like what the planet is made of or what they used to put in HVAC thermostats?
Or how about a Mercury Comet.

 

[BMR Tech]

lmao

 

[jasonstang]

Not sure if y'all are joking, but the "inhgs" gauge is vacuum... common SAE measurement for vacuum is inches of mercury. So the abbreviation is "in. Hg"... 30 inches mercury is full vacuum. 0 inches is normal ambient atmospheric pressure. Goes back to days of liquid mercury barometers, and the length up a tube the mercury would be pushed/pulled by changes in pressure. if you have a turbo/supercharger, this gauge would go up and past the zero. in fact i think the ecoboost models have a psi pressure gauge there instead to show boost. oh and it is measuring vacuum pulled in the intake manifold.

Not joking. He's got a GT so the smaller the number the bigger the throttle opening the faster he goes.
0 would be wide open.

 

[jasonstang]

More Data...More Problems.....haha

I actually had the same concern....but my "concern" was when the engine is at normal operating temp and at idle. I'm normally ~20-25psi in those conditions. That seemed a bit low to me. But I have no real basis for reference. So I trust the Ford engineers designed an oil pump that provides sufficient oil pressure at idle.

I'm curious as to what the minimum pressure at idle should be. I'm thinking ~ 20 psi?

Watched TV show where the guys brand new race motor's oil pressure wouldn't get above 35psi.. He ended up destroying his bearings.

So that thought is going though my head as I see my gauge sitting at 20-25psi. I realize that 20 psi at idle is very different then the TV show guy not seeing a pressure over 35psi...at high rpms.

20 psi at idle you will be seeing at least 90 at high rpm. Usually you want at least 10-15psi for every 1000rpm increase.

 

[Optimum Performance]

I have the GT on a different drive but for the Shelby GT350 Engine:
Oil pressure @ idle with engine at normal operating temperature 10–15 psi (69–103 kPa)
Oil pressure @ 2,000 rpm with engine at normal operating temperature 30–40 psi (207–276 kPa)

Notice, spec is at normal operating temperature. They do not worry about cold oil pressure because its variable.

Modern engines warm up very fast, ECT comes right up and with low vis. oils 5W-10Ws cold oil does not really factor in. If the coolant is up to temp the engine is warm, the oil spraying around is removing heat as it increases in viscosity. These engines all run .001-.002 bearing clearance, coolant temp is more important to get everything to proper size than oil temp or oil pressure.

 

[offroadkarter]

Converting gasoline to mercury? Would that be like what the planet is made of or what they used to put in HVAC thermostats?
Or how about a Mercury Comet.

yes

 

[NoVaGT]

Not sure if you're aware of this, but our engines actually convert gasoline to mercury, which is.....

 

[CB]

Holy shit is that great.

 

[FIVE_LITER]

I have the GT on a different drive but for the Shelby GT350 Engine:
Oil pressure @ idle with engine at normal operating temperature 10–15 psi (69–103 kPa)
Oil pressure @ 2,000 rpm with engine at normal operating temperature 30–40 psi (207–276 kPa)

Notice, spec is at normal operating temperature. They do not worry about cold oil pressure because its variable.

Modern engines warm up very fast, ECT comes right up and with low vis. oils 5W-10Ws cold oil does not really factor in. If the coolant is up to temp the engine is warm, the oil spraying around is removing heat as it increases in viscosity. These engines all run .001-.002 bearing clearance, coolant temp is more important to get everything to proper size than oil temp or oil pressure.

So you're saying I should stop giving a shit about wether or not my oil temp is low or normal before going on full throttle blasts?

 

[jasonstang]

So you're saying I should stop giving a shit about wether or not my oil temp is low or normal before going on full throttle blasts?

I would wait tills its at least normal before giving full throttle. When it's low, it's very thick and the pressure can be too high so the by pass valve would be open not filtering oil through the filter element.

 

[Optimum Performance]

I would wait tills its at least normal before giving full throttle. When it's low, it's very thick and the pressure can be too high so the by pass valve would be open not filtering oil through the filter element.

Yes, let it warm up. If the coolant is up to temp your oil should be close to warm enough. Depending if you are in a warm climate or cold determines how that plays out. If you live in Pardise and it's always 80F outside everything is always pre-warmed

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